Embrace that 3rd Party Universe :) Comment with your best links. I will try to update this and maybe some day we can make this a sticky.
https://edtools.cc/ all around a very good site with good tools for bounty hunting, trading, mining
https://edmining.com/ complete infos about mining. Builds, places, tips
https://inara.cz/ you should know this! link it to your accoutn and enjoy one of the best sites about elite
https://edsy.org/ tinker with ship builds. you can choose, ships, modules, blueprints and see exact values and changes
I use EDDI and occasionally EDDiscovery. EDDI has a nice voice feature allowing me to stay tabbed out on the 300k+ ls trips; EDDiscovery is very strong when it comes to exploration.
Both can submit to EDDN, Inara, and EDSM. EDDis also submits to Edastro.
There’s seriously a lot of data that gets posted to EDDN like docking status. Theoretically this stuff is all tactically useful, but the only tool making use of it (that i know of) is https://github.com/inorton/EDMCHits, an EDMC plugin.